Hello All, I recently purchased a 1998 z-71 that was experiencing the soft brake pedal issue. After bleeding a gallon of brake fluid through the system with pedal pump, vacuum bleeder, abs firing and gravity nothing helped. I then re-adjusted the rear brake shoes to the point it was almost impossible to put the drum back on and bang, solid pedal and awesome brakes. I guess being an old school GM gear head and always adjusting drum out to a light scrape is not sufficient in this application. Hope this helps anyone else experiencing this aggravating issue.